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Concentrations of credit risk and major customers | 12 Months Ended
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Sep. 30, 2016
Risks and Uncertainties [Abstract] |
Concentrations of credit risk and major customers | Concentrations of credit risk and major customers Financial instruments that potentially subject us to significant concentrations of credit risk consist primarily of accounts receivable - billed, billable and unbilled. The majority of our business is in the U.S. Revenue from foreign projects and offices was 28%, 26% and 23% of total revenue for the years ended September 30, 2016, 2015 and 2014, respectively. In the year ended September 30, 2016, approximately 46% of our total revenue was derived from state government agencies, many of whose programs received significant federal funding, 26% from foreign government agencies, 22% from U.S.-based Federal Government agencies, and 6% from other sources including local municipalities and commercial customers. We believe that the credit risk associated with our receivables is limited due to the credit worthiness of these customers. During fiscal year 2016, the U.S. Federal Government, the U.K. Government and the state of New York each provided more than 10% of our annual revenue. Revenue from the U.S. Federal Government was exclusively within the U.S. Federal Segment. Revenue from the U.K. Government was both within the Health Services and Human Services Segments. Revenue from the state of New York was exclusively within our Health Services Segment. The proportion of revenue recognized from customers providing in excess of 10% of our consolidated revenue for each of the three years ended September 30, 2016 was from the following governments:
| Year ended September 30,
| 2016 |  | 2015 |  | 2014
U.S. Federal Government | 22 | % |  | 20 | % |  | 17 | %
United Kingdom | 16 | % |  | * |  |  | * |
New York | 12 | % |  | 10 | % |  | * |
Australia | * |  |  | * |  |  | 10 | %
California | * |  |  | * |  |  | 10 | %
Texas | * |  |  | * |  |  | 10 | %
_________________________________________
* | Government provided less than 10% of our consolidated revenue in this year.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6327-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6442-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 + Details
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